Basic Programming Kotlin

Which keyword used to create a mutable variable?

• var

• val

• const

• mutable

Which is the right declaration to make a variable with the Character data type?

• val char = 'ABC'

• val char = "A"

• val char = 'A'

• val char = A

Which the right code to declare nullable variable in Kotlin?

• val text: String = null

• val text: String? = null

• val text: nullable = null

• val text: String

Elvis operator keyword?

• ?:

• ??

• :?

• ?.

How do you make the range from a to b?

• a in b

• a_b

• a to b

• a..b

What value is 10 until 12

• 10 11 12

• 10 11

• 11 12

• All is wrong!

When you use a data class, what functions will the compiler automatically provide?

• paste(), toDouble(), notEquals()

• toString(), cut(), dan isEmpty()

• equals(), copy, dan toInt()

• copy(), equals, dan toString()

Mention the collection in the kotlin!

• list, set, dan map

• array, set, dan map

• list, setter, hashMap

• arrayList, set, map

How to get the name from this data class?

val dicoding = DataUser(name = "Dicoding Indonesia", address = "Bandung")

• dicoding.name

• DataUser.name

• dicoding.name()

• DataUser.name()

Which is the correct data class?

• class DataUser(name : String, address : String)

• data class DataUser(name : String, address : String)

• data class DataUser(val name : String, val address : String)

• open data class DataUser(val name : String, val address : String)